The metadata below describe the original scanning. Follow the "All Files: HTTP" link in the "View the book" box to the left to find XML files that contain more metadata about the original images and the derived formats (OCR results, PDF etc.). See also the What is the directory structure for the texts? FAQ for information about file content and naming conventions.
"In order that the reader may be able to realize the character of the more remarkable Irish airs to which my songs are written, seven and twenty of them are printed in a musical appendix to this volume."--Pref. to 1st ed